Circuit Description
WARNING: This page is about a different car, the 1998 Cadillac Seville. However, it is still accessible from the selected car via links, so may be relevant.
Module performs internal tests on EEPROM each time module performs a write function to a memory address in the EEPROM. Module reads back data that has been written and compares it to incoming data. If data does not match after 3 consecutive write and verify attempts, module will indicate a write malfunction is current.
DTC will set when data read back after a write does not match data being written 3 consecutive times or module detects an interval write malfunction. These conditions must occur when data is being written.